Clutch for hoisting-machines.



N0 MODEL.

PATENTED AUG. 11, 1903.

P. F. DUNDON,

CLUTCH FOR HOISTING MACHINES.

APPLICATION FILED DEC. 13, 1902.

lf wm w THE NORRIS PETERS c0. FNOTO-UTHQ, WASHINGTON, u.

UNITED STATES Patented August 11, 1903.

PATENT OFFICE.

CLUTCH FOR HOISTING- MACHINES.

SPECIFIGATIONJforming part of Letters Patent No. 735,862, dated. August11, 1903. I Application filed December 13,1902. Serial No. 135,116. (NomodeL To (tZZ whom it, may concern.-

Be it known that I, PATRICK F. DUNDON, a citizen of theUnited'States,residing at San Francisco, county of San Francisco, andState of California, have invented certain new and usefulImprovements inClutches forHoisting- Machines; and I hereby declare the following to bea full, clear, and exact description of the same, reference being had tothe accompanyingdrawings,formingapartofthis specification.

My invention relates to an improvement in friction-gearing especiallyadapted to winding or hoisting machinery.

Myimprovement consists of a strongpivoted lever mounted in the endframing that bears against the movable element of the clutch, this leveroperated by a cam, wheelgearing, and a hand-lever, as illustrated in thedrawings herewith, that form a part of this specification, also in thecombination and arrangement of parts, as hereinafter explained andillustrated by drawings, forming a part of this specification.

The objects of my. invention are to avoid hollow shafts, axial orcentral devices to move and set such clutches, and to arrange suchmachines so that they will occupy a minimum space laterally whenemployed on vessels, pontoons, or derrick-frames. On such vessels thehoisting apparatus is always crowded, and when arranged in the usualmanner, with the setting gearing applied centrally through thedrum-shaft, the Width of the machine is so unduly increased as topreclude its use in many places. By my improvement I limit the width ofthe whole apparatus to the Width of the hoisting-drum and clutch properand also avoid the costly drilling of the main shaft.

Referring to the drawings, Figure I is a partlylongitudinalsectionthrough a clutched winding barrel or drum'and its operatinggearingarranged according to my invention. Fig. II is an end view of the samemachine. Fig. III is a view of the opposite side of the main standardthat supports the clutch-operating mechanism. Fig. IV is an enlargedview, mainly in section, showing details of the clutch-setting devices.

The main shaft 1 is made solid and passes through the winding-drum 2,the latter adapted for a rope or chain, that is wound between theflanges 3 and 4 in the usual manner. The flange 4 is provided on itsoutside with a lateral grooved channel around the periphery to receivethe friction-ring 5, commonly made of wood and held as shown. Thisclutch-ring 5, which may be of any suitable material or of any number ofpieces joined together, is attached to a strong gear-wheel 7, driven bythe usual train of wheels connecting to the motive power. The winding-drum 2 is loosely mounted and longitudinally movable on the shaft 1, sothat when pressed toward the wheel 7 the clutch is engaged and whenreleased is moved back by the springs '8, that hold the clutch out ofcontact, permitting the drum 2 to be free to revolve in eitherdirection.

The shaft 1 is held in the bearings 12 and 13, the former made integralwith the stand-' ard 10, the whole being fastened to a baseframe 14,made of metal or wood, in the usual manner.

T0 engagethe clutch and cause the barrel 2 to revolve in the directionof winding, or to raise a load, it is pressed toward the wheel 7 bymeans of .a strong lever 9 mounted in the standard 10 pressed downwardby a cam 15. The cam 15 is held rigidly on the shaft 17 and is turned bythe ge'ar-wheelsl8 and a crank 19, the gear-wheels 18 being made ofsizes relatively to the amountof force to be applied to the cam 15 andlever 9. The lever 9 is forked, as shown in Fig. III, to pass partlyover the shaft 1 at each side to prevent lateral movement of the leverand keep it in position. This lever 9 bears against a collar 20, made ofhardened steel, that in turn presses against the end of the drum 2. Inthe face of the lever 9 I'place a roller 22, held on a screw 23, thatbears in a matrix or curved seat at the back. This roller projectsslightly beyond the face of the lever 9, and being free to turn is bythis means prevented from wearing into flat faces where it bears on thecollar 20.

In operating an attendant movesthe handle l9 backward and forward orthroughout a range in proportion to the pressure to be applied,starting, raising, and lowering loads by control of the friction-clutch,the load itself causing the reverse or backward movement of the drum 2when lowering loads.

IOO

Having thus described thev nature and ob- .jects of my invention, what Iclaim as new,

ing, a cam, gears, and a crank for operating said lever, also mountedabove said shaft- 1; bearing, whereby the Width of the machine ispractically confined Within the limits of the drum and clutch mechanism.

In testimony whereof I have signed my name to this specification in thepresence of 20 two subscribing witnesses.

PATK. F. DUNDON.

NVitnesses:

A. W. GRANT, P. W. J. LANDER.

